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Finding the Fourth Proportional to 80,118.74, 120,167.64 and 20,958.95

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Solution

The fourth proportional to 80,118.74, 120,167.64 and 20,958.95 is: 31,435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,118.74 : 120,167.64 = 20,958.95 : x
  2. Step 2: Convert to fraction form
    80,118.74/120,167.64 = 20,958.95/x
  3. Step 3: Cross multiply
    80,118.74x = 120,167.64 × 20,958.95
  4. Step 4: Simplify right side
    80,118.74x = 2,518,586,957.54
  5. Step 5: Solve for x
    x = 2,518,586,957.54/80,118.74
  6. Step 6: Final answer
    x = 31,435.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.